TY - JOUR
T1 - Hydrogen-broadening coefficients in the ν7 band of ethylene at low temperature
AU - Bouanich, J.-P.
AU - Blanquet, G.
AU - Walrand, J.
AU - Lepère, M.
N1 - Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/10/1
Y1 - 2004/10/1
N2 - H-broadening coefficients have been measured for 35 lines of CH at 173.2K in the P, Q, and R branches of the ν fundamental band near 10μm, using a tunable diode-laser spectrometer. These lines were individually fitted with a Voigt and a Rautian profile to determine their collisional widths. The resulting broadening coefficients, as well as those previously measured at room temperature are compared with values calculated on the basis of a semiclassical model of interacting linear molecules, using an atom-atom Lennard-Jones potential in addition to the weak electrostatic contributions. A satisfactory agreement is obtained for the results at room temperature, but the theoretical results at low temperature are generally smaller than the experimental data. Finally, the temperature dependence of the broadening coefficients has been determined both experimentally and theoretically.
AB - H-broadening coefficients have been measured for 35 lines of CH at 173.2K in the P, Q, and R branches of the ν fundamental band near 10μm, using a tunable diode-laser spectrometer. These lines were individually fitted with a Voigt and a Rautian profile to determine their collisional widths. The resulting broadening coefficients, as well as those previously measured at room temperature are compared with values calculated on the basis of a semiclassical model of interacting linear molecules, using an atom-atom Lennard-Jones potential in addition to the weak electrostatic contributions. A satisfactory agreement is obtained for the results at room temperature, but the theoretical results at low temperature are generally smaller than the experimental data. Finally, the temperature dependence of the broadening coefficients has been determined both experimentally and theoretically.
UR - http://www.scopus.com/inward/record.url?scp=4544244402&partnerID=8YFLogxK
U2 - 10.1016/j.jms.2004.06.001
DO - 10.1016/j.jms.2004.06.001
M3 - Article
AN - SCOPUS:4544244402
SN - 0022-2852
VL - 227
SP - 172
EP - 179
JO - Journal of molecular spectroscopy
JF - Journal of molecular spectroscopy
IS - 2
ER -